1 /* $NetBSD: amdgpu_dc_vm_helper.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $ */
2
3 /*
4 * Copyright 2018 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: AMD
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_dc_vm_helper.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $");
30
31 #include "vm_helper.h"
32 #include "dc.h"
33
vm_helper_mark_vmid_used(struct vm_helper * vm_helper,unsigned int pos,uint8_t hubp_idx)34 void vm_helper_mark_vmid_used(struct vm_helper *vm_helper, unsigned int pos, uint8_t hubp_idx)
35 {
36 struct vmid_usage vmids = vm_helper->hubp_vmid_usage[hubp_idx];
37
38 vmids.vmid_usage[0] = vmids.vmid_usage[1];
39 vmids.vmid_usage[1] = 1 << pos;
40 }
41
dc_setup_system_context(struct dc * dc,struct dc_phy_addr_space_config * pa_config)42 int dc_setup_system_context(struct dc *dc, struct dc_phy_addr_space_config *pa_config)
43 {
44 int num_vmids = 0;
45
46 /* Call HWSS to setup HUBBUB for address config */
47 if (dc->hwss.init_sys_ctx) {
48 num_vmids = dc->hwss.init_sys_ctx(dc->hwseq, dc, pa_config);
49
50 /* Pre-init system aperture start/end for all HUBP instances (if not gating?)
51 * or cache system aperture if using power gating
52 */
53 memcpy(&dc->vm_pa_config, pa_config, sizeof(struct dc_phy_addr_space_config));
54 dc->vm_pa_config.valid = true;
55 }
56
57 return num_vmids;
58 }
59
dc_setup_vm_context(struct dc * dc,struct dc_virtual_addr_space_config * va_config,int vmid)60 void dc_setup_vm_context(struct dc *dc, struct dc_virtual_addr_space_config *va_config, int vmid)
61 {
62 dc->hwss.init_vm_ctx(dc->hwseq, dc, va_config, vmid);
63 }
64
dc_get_vmid_use_vector(struct dc * dc)65 int dc_get_vmid_use_vector(struct dc *dc)
66 {
67 int i;
68 int in_use = 0;
69
70 for (i = 0; i < dc->vm_helper->num_vmid; i++)
71 in_use |= dc->vm_helper->hubp_vmid_usage[i].vmid_usage[0]
72 | dc->vm_helper->hubp_vmid_usage[i].vmid_usage[1];
73 return in_use;
74 }
75
vm_helper_init(struct vm_helper * vm_helper,unsigned int num_vmid)76 void vm_helper_init(struct vm_helper *vm_helper, unsigned int num_vmid)
77 {
78 vm_helper->num_vmid = num_vmid;
79
80 memset(vm_helper->hubp_vmid_usage, 0, sizeof(vm_helper->hubp_vmid_usage[0]) * MAX_HUBP);
81 }
82